Ground-state properties of trapped Bose-Fermi mixtures: Role of exchange correlation

被引：25
|
作者：
Albus, AP [1 ]
Illuminati, F
Wilkens, M
机构：
[1] Univ Potsdam, Inst Phys, D-14469 Potsdam, Germany
[2] Univ Salerno, Dipartimento Fis, I-84081 Baronissi, SA, Italy
[3] Ist Nazl Fis Mat, I-84081 Baronissi, SA, Italy
来源：
PHYSICAL REVIEW A | 2003年 / 67卷 / 06期
关键词：
D O I：
10.1103/PhysRevA.67.063606
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We introduce density-functional theory for inhomogeneous Bose-Fermi mixtures, derive the associated Kohn-Sham equations, and determine the exchange-correlation energy in local-density approximation. We solve numerically the Kohn-Sham system, and determine the boson and fermion density distributions and the ground-state energy of a trapped, dilute mixture beyond mean-field approximation. The importance of the corrections due to exchange correlation is discussed by a comparison with current experiments; in particular, we investigate the effect of the repulsive potential-energy contribution due to exchange correlation on the stability of the mixture against collapse.
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页数：6
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